JOHN DEERE RX75 RIDING MOWERS Service Repair Manual Instant Download (TM1391)

RX and SX Series Riding Mowers TECHNICAL MANUAL John Deere Lawn & Grounds Care Division TM1391 (JUN-88) Litho in U.S.A

Introduction FOREWORD This manual is written for an experienced technician. Essential tools required in performing certain service work are identified in this manual and are recommended for use. This manual is part of a total product support program. FOS MANUALS REFERENCE Live with safety: Read the safety messages in the introduction of this manual and the cautions presented throughout the text of the manual. N this symbol on the machine or in this manual, be alert to the potential for personal injury. TECHNICAL MANUALS MACHINE SERVICE COMPONENT MANUALS COMPONENT SERVICE This is the safety-alert symbol. When you see Fundamentals of Service (FOS) Manuals cover basic theory of operation, fundamentals of troubleshooting, general maintenance, and basic type of failures and their causes. FOS Manuals are for training new personnel and for reference by experienced technicians. Technical manuals are divided in two parts: repair and diagnostics. Repair sections tell how to repair the components. Diagnostic sections help you identify the majority of routine failures quickly. Technical Manuals are concise guides for specific machines. Technical manuals are on-the-job guides containing only the vital information needed for diagnosis, analysis, testing, and repair. Information is organized in groups for the various components requiring service instruction. At the beginning of each group are summary listings of all applicable essential tools, service equipment and tools, other materials needed to do the job, service parts kits, specifications, wear tolerances, and torque values. Component Technical Manuals are concise service guides for specific components. Component technical manuals are written as stand-alone manuals covering multiple machine applications. Binders, binder labels, and tab sets can be ordered by John Deere dealers direct from the John Deere Distribution Service Center. O53,TMIFC -19-26JAN90 TM1391 (17APR90) RX and SX Series Riding Mowers 170196 PN=3

Introduction TO JOHN DEERE DEALERS FILING INSTRUCTIONS TM-1391 (JULY 1988) RX63, RX73, TX75, SX75, RX95, SX95 Riding Mowers This is a complete revision of TM-1391. Please discard old TM-1391 dated February 1987. For complete engine repair information use CTM-5. Engine tests and adjustments are covered in Section 220 of this manual. Model RX63 has been added. An abundance of diagnostic information has been added to the operation and test sections. ONE -19-22MAY89 TM1391 (17APR90) RX and SX Series Riding Mowers 170196 PN=4

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Contents Group 15 Component Locations/Wiring Diagrams SECTION 10 SAFETY AND SPECIFICATIONS Group 05 Safety Group 10 Repair Specifications 10 SECTION 250 POWER TRAIN OPERATION AND TESTS Group 05 Power Train System Checkout Group 10 Power Train System Diagnosis SECTION 20 ENGINE Group 01 Engine Repair Group 05 Engine Removal and Installation 20 SECTION 30 FUEL AND AIR SYSTEM REPAIR Group 01 Air Cleaner, Breather and Carburetor Group 05 Fuel Transfer System Group 10 Fuel and Air System 30 SECTION 50 POWER TRAIN REPAIR Group 05 Clutch Linkage and Belts Group 10 Variable Speed System Group 15 Transaxle Group 20 PTO Linkage 50 SECTION 60 STEERING AND BRAKE REPAIR Group 05 Steering System Repair Group 10 Brake Repair 60 SECTION 80 MISCELLANEOUS REPAIR Group 05 Mower Spindles Group 10 Mower Deck and Lift Linkage Group 15 Engine Shroud 80 SECTION 210 SPECIFICATIONS AND OPERATIONAL CHECKOUT Group 01 Specifications Group 05 Operational Checkout Procedure 210 SECTION 220 ENGINE/FUEL SYSTEM OPERATION AND TESTS Group 05 Engine/Fuel System Checkout Group 10 Engine/Fuel System Diagnosis 220 SECTION 240 ELECTRICAL OPERATION AND TESTS Group 05 Electrical System Checkout Group 10 Electrical System Diagnosis 240 All information, illustrations and specifications in this manual are based on the latest information available at the time of publication. The right is reserved to make changes at any time without notice. TM1391-19-17APR90 250 COPYRIGHT 1989 DEERE & COMPANY Moline, Illinois All rights reserved A John Deere ILLUSTRUCTION Manual i TM1391 (17APR90) RX and SX Series Riding Mowers 170196 PN=168

Section 10 10 SAFETY AND SPECIFICATIONS Contents Page Group 05 Safety . . . . . . . . . . . . . . . . 10-05-1 Group 10 Repair Specifications Bolt Torque CHart . . . . . . . . . . . . . . . . 10-10-1 O-Ring Boss Fitting Service Recommendations . . . . . . . . . . . . . . . 10-10-2 Engine . . . . . . . . . . . . . . . . . . . . . . . . 10-10-3 Other Material . . . . . . . . . . . . . . . . . . . 10-10-4 10-1 TM1391 (17APR90) RX and SX Series Riding Mowers 170196 PN=148

Group 05 Safety RECOGNIZE SAFETY INFORMATION 10 05 1 This is the safety-alert symbol. When you see this symbol on your machine or in this manual, be alert to the potential for personal injury. T81389 -UN-07DEC88 Follow recommended precautions and safe operating practices. O53,ALERT -19-26JAN90 UNDERSTAND SIGNAL WORDS A signal word DANGER, WARNING, or CAUTION is used with the safety-alert symbol. DANGER identifies the most serious hazards. TS187 -19-30SEP88 Safety signs with signal word DANGER or WARNING are typically near specific hazards. General precautions are listed on CAUTION safety signs. CAUTION also calls attention to safety messages in this manual. O53,SIGNAL -19-26JAN90 HANDLE FUEL SAFELY AVOID FIRES Handle fuel with care: it is highly flammable. Do not refuel the machine while smoking or when near open flame or sparks. TS202 -UN-23AUG88 Always stop engine before refueling machine. Fill fuel tank outdoors. Prevent fires by keeping machine clean of accumulated trash, grease, and debris. Always clean up spilled fuel. O53,FIRE1 -19-26JAN90 10-05-1 TM1391 (17APR90) RX and SX Series Riding Mowers 170196 PN=6

Safety WEAR PROTECTIVE CLOTHING 10 05 2 Wear close fitting clothing and safety equipment appropriate to the job. Prolonged exposure to loud noise can cause impairment or loss of hearing. TS206 -UN-23AUG88 Wear a suitable hearing protective device such as earmuffs or earplugs to protect against objectionable or uncomfortable loud noises. O53,WEAR -19-26JAN90 PROTECT AGAINST NOISE Prolonged exposure to loud noise can cause impairment or loss of hearing. Wear a suitable hearing protective device such as earmuffs or earplugs to protect against objectionable or uncomfortable loud noises. TS207 -UN-23AUG88 O53,NOISE -19-26JAN90 PRACTICE SAFE MAINTENANCE Understand service procedure before doing work. Keep area clean and dry. Never lubricate or service machine while it is moving. Keep hands, feet, and clothing from power-driven parts. Disengage all power and operate controls to relieve pressure. Lower equipment to the ground. Stop the engine. Remove the key. Allow machine to cool. Securely support any machine elements that must be raised for service work. Keep all parts in good condition and properly installed. Fix damage immediately. Replace worn or broken parts. Remove any buildup of grease, oil, or debris. Disconnect battery ground cable (-) before making adjustments on electrical systems or welding on machine. TS218 -UN-23AUG88 O53,SERV -19-26JAN90 10-05-2 TM1391 (17APR90) RX and SX Series Riding Mowers 170196 PN=7

Safety AVOID HIGH-PRESSURE FLUIDS 10 05 3 Escaping fluid under pressure can penetrate the skin causing serious injury. X9811 -UN-23AUG88 Avoid the hazard by relieving pressure before disconnecting hydraulic or other lines. Tighten all connections before applying pressure. Search for leaks with a piece of cardboard. Protect hands and body from high pressure fluids. If an accident occurs, see a doctor immediately. Any fluid injected into the skin must be surgically removed within a few hours or gangrene may result. Doctors unfamiliar with this type of injury may call the Deere & Company Medical Department in Moline, Illinois, or other knowledgeable medical source. O53,FLUID -19-26JAN90 10-05-3 TM1391 (17APR90) RX and SX Series Riding Mowers 170196 PN=8

Group 10 Repair Specifications 10 10 1 M28575 -19-28APR89 M21,1010K,C -19-25AUG82 10-10-1 TM1391 (17APR90) RX and SX Series Riding Mowers 170196 PN=10

Repair Specifications/O-Ring Boss Fitting Service Recommendations O-RING BOSS FITTINGS SERVICE RECOMMENDATIONS 10 10 2 1. Inspect boss O-ring boss seat. It must be free of dirt and defects. If repeated leaks occur, inspect for defects with a magnifying glass. Some raised defects can be removed with a slip stone. Occasionally a lower durometer O-ring will seat against a rough seat. If neither of these solutions work, the component must be replaced. 2. Put hydraulic oil, petroleum jelly or soap on the O-ring. Put a thimble over the threads to protect O-ring from nicks. Slide O-ring over the thimble and into the turned down section of fitting. For angle fittings, loosen special nut and push special washer against threads so O-ring can be installed into the turned down section of fitting. 3. Turn fitting into the boss by hand until special washer or washer face (straight fitting) contacts boss face and O-ring is squeezed into its seat. 4. To position angle fittings, turn the fitting counterclockwise a maximum of one turn. 5. Tighten straight fittings to torque valve shown on chart. For angle fittings, tighten the special nut to valve shown in the chart while holding body of fitting with a wrench. STRAIGHT FITTING OR SPECIAL NUT TORQUE (1) Torque1 N m Thread Size Number of Flats2 (lb-ft) 7/16-20 UNF 1/2-20 UNF 9/16-18 UNF 3/4-16 UNF 7/8-14 UNF 1-1/16-12 UN 1-3/16-12 UN 1-5/16-12 UN 1-5/8-12 UN 1-7/8-12 UN 12 16 24 46 62 102 122 142 190 217 (9) (12) (18) (34) (46) (75) (90) (105) (140) (160) 2 2 2 2 1-1/2 1 1 3/4 3/4 1/2 1. Torque tolerance is 10 percent. 2. To be used if a torque wrench cannot be used. After tightening fitting by hand, put a mark on nut or boss; then tighten special nut or straight fitting the number of flats shown. M45,1010A,4 -19-10JAN85 10-10-2 TM1391 (17APR90) RX and SX Series Riding Mowers 170196 PN=11

Repair Specifications/Engine ENGINE For complete specifications on repair of Kawasaki engines see CTM-5. 10 10 3 Engine sheave mounting cap screw torque . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 13 N m (54 10 lb-ft) Engine mounting cap screw torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2 N m (14 5 lb-ft) Spark plug gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.76 N M (0.030 in.) Spark plug torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 20 N m (80 180 lb-in.) Idle mixture screw (initial setting) 6 hp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1/8 turns open 9 hp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1/8 turns open 12.5 hp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1/2 turns open Idle speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1550 75 rpm Wide open throttle (no load) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3350 75 rpm Fuel pump output at 3000 rpm (12.5 hp only) . . . . . . . . . . . . . . . . . . . . . . . . 0.09 L (0.2 pt) in 15 seconds TRANSAXLE Cover cap screw torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 N m (95 lb-in.) Shift lever detent set screw torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flush with cover Brake lever nut torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 N m (95 lb-in.) STEERING Tie rod attaching nut torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 30 N m (18.5 2 lb-ft) BRAKE Brake pedal free play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 mm (1-1/4 in.) Brake pad thickness (min.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 mm (1/4 in.) MOWER DECK Mower spindle sheave locknut torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 N m (103 lb-ft) M22,1010G,A -19-01JUL88 10-10-3 TM1391 (17APR90) RX and SX Series Riding Mowers 170196 PN=12

Repair Specifications/Other Material OTHER MATERIAL 10 10 4 Number Name Use John Deere LOCTITE Clean and Cure Primer T43511 Clean threads TY9369 John Deere LOCTITE Threadlock and Sealer (low strength) T43512 John Deere LOCTITE Threadlock and Sealer (medium strength) TY6305 John Deere Flexible Sealant T43514 John Deere LOCTITE Plastic Gasket John Deere GASKET MAKER PT502 PLASTIGAGE Measure engine bearing clearance John Deere SLIP-PLATE Lubricant TY6431 John Deere NEVER-SEEZ Lubricant PT569 John Deere LUBRIPLATE ALVANIA EP2 Lubricant TY6333 Moly High-Temperature EP Grease TEFLON Material TY9375 John Deere LOCTITE Pipe Sealant with TEFLON LOCTITE is a trademark of the Loctite Corp. GASKET MAKER is a trademark of the Permatex Corp. PLASTIGAGE is a trademark of the TRW Corp. NEVER-SEEZ is a trademark of the Never-Seez Compound Corp. LUBRIPLATE is a trademark of Fiske Brothers Refining. ALVANIA is a trademark of the Shell Oil Co. TEFLON is a trademark of the Du Pont Co. M22,1010G,2 -19-01DEC86 10-10-4 TM1391 (17APR90) RX and SX Series Riding Mowers 170196 PN=13

Section 20 ENGINE Contents Page 20 Group 01 Engine Repair John Deere Engine Repair Use CTM-5 . 20-01-1 Group 05 Engine Removal and Installation Remove Engine-12.5 HP Models . . . . . . 20-05-1 Install Engine-12.5 HP Models . . . . . . . . 20-05-3 Remove Engine-9 HP and 6 HP Models . 20-05-6 Install Engine-9 HP and 6 HP Models . . . 20-05-8 20-1 TM1391 (17APR90) RX and SX Series Riding Mowers 170196 PN=150

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Group 01 Engine Repair JOHN DEERE ENGINE REPAIR USE CTM-5 For complete repair information the component technical manual (CTM) is also required. Use the component technical manual in conjunction with this machine manual. TS225 -UN-17JAN89 20 01 1 M22,2001G,1 -19-10JUN88 20-01-1 TM1391 (17APR90) RX and SX Series Riding Mowers 170196 PN=14

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